36.　 The children should learn to ___ themselves in the presence of guests.

A. act　　　　　　 B. perform　　　　 C. behave　　 D. present

35.　 If you are really going to buy this computer, I can ___ you a reasonable price.

A. afford　　　　　 B. offer　　　　　 C. accept　　 D. receive

34.　 I can’t find my key. It ___ in my office.

A. must be forgotten　　　　　　　　 B. must be left

C. must have been forgotten　　　　　 D. must have been left

33.　 The ____he had made to clear up the mystery failed.

A. efforts　　　　　 B. strength　　　　 C. power　　 D. attempting

32.　 –You know I can be reached by telephone. Why didn’t you call me?

--I did several times, but couldn’t ___.

A. come across　　 B. ring off　　　　 C. call back　 D. get through

31.　 --What would you like for your birthday?

--Anything will ___.

A. do　　　　　 B. help　 　　　　　C. fit　　　　 D. work

30.　 I ran ___ an old friend of mine yesterday, whom I hadn’t seen for ages.

A. across　　　　　 B. cross　　　　　 C. after　　　 D. for

29.　 Above all we must make ___ that he comes on time.

A. definite　　　　 B. possible　　　　 C. sure　　　 D. clear

28.　 I’m sorry, but I can’t ___ your voice on the phone.

A. realize　　　　 B. recognize　　　 C. remember　 D. listen

27.　 I didn’t manage to do it ___ you had explained how.

A. unless　　　　 B. until　　　　　 C. when　　 D. since